This primary source comes from the Records of the National Archives and Records Administration.
Full Citation: District of Columbia; 1913; The Library Atlas of the World; Volume 1: United States; Reference Maps and Drawings, 1934–1989; Records of the National Archives and Records Administration, Record Group 64; National Archives at College Park, College Park, MD. [Online Version, https://docsteach.org/documents/document/district-of-columbia-1913, October 13, 2024]